Bob sleigh



G. A. BAIN.

BOB SLEIGH.

(No Model.)

No. 406,867. Patented July 16, 1889.

N4 PETERS. PhMwl-ilhognphar. Washington. 11c.

UNITED STATES PATENT OFFICE.

lEORGE A. BAIN, OF \VOODSTOCK, ()N"ARIO, CANADA.

BOB-SLEIGH.

SPECIFICATION forming part of Letters Patent No. 406,867, dated July 16, 1889.

Application filed December 1, 1888. Serial No. 292,369. (No modeL Patented in Canada January 13, 1888, No. 28,364.

To all whom it may concern:

Be it known that I, GEORGE ARCHIBALD BAIN, wagon-builder, of the town of \Voodstock, in the county of Oxford, in the Province of Ontario, Canada, have invented a certain new and useful Improvement in Bob- Sleighs, (for which I have obtained apatent in Canada January 13. 1888, No. 28,354,) of which the following is a specification.

The object of the invention is to so connect the rear bolster with the rear bob and long reach and the long reach with the front bolster on the front bob that in passing over rough ground and holes the usual straining and displacement of the bolts connecting the bolsters to the bobs, caused by the rocking of the bobs, are obviated; and it consists, essentially, in providing curved bearing-blocks for the rear bolster to rest 011, so shaped that in passing over rough or uneven ground the curved bearing-blocks may slide freely under the rear bolster, which is attached to the long reach, and through a sleeve formed under the said bolster, and the consequent sliding motion of the upper surface of the curved bearing-blocks against the bottom of the rear bolster takes place on surfaces practically parallel to the direction of the long reach, no matter what the position be which the rear bob may assume; and it also consists in attaching the front end of the long reach to the front bolster by an eye-and-bolt joint eonneeted with a swivel on the end of the reach, so as to permit, without undue strain, of any motion of either of the bobs which might tend to twist the reach. Motion to the right or left is provided for by the king-bolt, which passes through the front bolster and the frame of the front bob in the usual manner.

Figure l is a perspective view of my improved bob-sleigh. Fig. 2 is a transverse section through the rear bolster, sleeve, and bearing-blocks.

In the drawings like letters of reference indicate similar parts in the different figures.

In Fig. 1 the rear bob is shown in the act of descending into a hole, the bearing-blocks D, owing to the action of the bob, having slid forward from its normal position a; when running on level ground through the sleeve E on the rear bolster O, which is attached to the long reach A, and the dotted lines show the position of the rear bolster G with reference to the bearing-blocks I) when the bob is rising out of a hole, the bearing-blocks I) having slid backward to the position indicited.

The position of the rear bolster Cl when the bob is running on level ground is a mean between the two positions just ind icated at abou t 00, as shown in the drawin Thus a sliding motion back and forth under the load on surfaces practically parallel to each other, no matter what position the bob may assume, is permitted without any undue straining of the bolts or twisting of the rear bolster.

The front end of the long reach A is connected to the front bolster II by means of the bolt 0, which passes through the eye a in the curved plate 19, which is attached to the front bolster II, and which bolt 0, which also passes through the swivel m, is attached, as indicated, to the end of the long reach A. B is the short reach, pivot-ally connecting the front of the rear bob F to the long reach A in the usual manner, and E are the cross-beams of the bob, which carry the bearingblocks D, supporting the rear bolster C, which is attached at its center to the long reach A. The bifurcated rod G also bolted to the long reach A, as shown, and the hooked ends thereof pass through holes I) in the front extension of the plates 0 under the rear bolster 0. These plates c are preferably made of steel, so as to give a hard and smooth rubbing-surface. The rear bob F and bolster O are connected by boltsf, which pass through the bolster and its plates 0, through thimblcs d at each side of the bearing-blocks. These bolts fare made sufficiently long to receive a clip g, which is placed under each bearing-block D, which clip is screwed up against the bottom of the thimblcs (Z by the nuts 71 The sleeves thus formed under each end of the rear block C are made sufficiently large both in breadth and height to permit the bearing-blocks D to move freely thereon under the rocking motion of the bob when passing over uneven ground. These details of the construction of the sleeve are more particularly shown in Fig. 2.

The bearing-blocks D are curved, as indicated in Fig. 1, on the top and bottom, at those portions thereof which are designed to slide through the sleeves formed under the rear bolster O, and are shod at n, that portion thereof which slides against the bottom plates 0 of the rear bolster C, with steel or other suitable material.

The king-bolt 70, which passes through the front bolster and the frame of the front bob, is the pivot on which the front bob turns when rounding corners.

What I claim as my invention is- 1. In a double bob-sleigh, the rear bob provided with curved bearing-blocks for the rear bolster to rest on, the said bearing-blocks being so shaped that they may slide freely under the rear bolster, which is rigidly attached to the long reach, and through sleeves formed below the said bolster, a short reach pivotally attached to the long reach and to the rear bob, and the long reach pivotally attached at its front end to the front bolster by means of eyebolt and swivel, substantially as specified.

2. In a double bob-sleigh, the rear bob pivotally attached to the long reach by a short reach, having bearing-blocks so shaped as to be adapted to slide through sleeves formed under the rear bolster with a surface practically parallel and adjacent to the bottom of the rear bolster, which is rigidly attached to the long reach, substantially as described and specified.

3. In a double bob-sleigh, the long reach on the rear bob are adapted to slide under the rocking of the bob, so as to present at all times surfaces practically parallel to the. bottom of the rear bolster, substantially as specified.

4. In a double bob-sleigh, the combination of long reach A, the bifurcated rod G, bolted to the long reach and having hooked ends adapted to engage in holes I) in the plate 0, the rear bolster 0, plates 6, bolts f, thimbles d, clip g, nuts h, and curved bearing-blocks D, having the curved metal plates n and formed on the rear bob F, substantially as specified.

5. In a double bob-sleigh, the combination of the long reach A and swivel m, pivotally attached thereto, the curved plate 17, rigidly attached to the front bolster H, and eyebolt 0, connecting the swivel with the curved plate 19, substantially as specified.

6. In a double bob-sleigh, the combination, with the rear bolster C, of the bolts f, metal plate 0, thimbles d, clip g, nuts h, plates 71, and curved bearing-blocks D, attached to the rear bob, substantially as specified.

7. In a double bob-sleigh, curved bearingpieces attached to the rear bob and so shaped as to be adapted to slide under the pitching of the bob when passing over uneven ground, so as to present even surfaces to the adjacent surfaces of the rear bolster, substantially as specified.

WVoodstock, November 24, 1888.

GEORGE A. BAIN.

In presence of- GEORGE SMITH, JOHN A. BAIN- 

